// IPC服务实现

use log::info;
use crate::core::{Service, ServiceStatus};

/// IPC服务
pub struct IPCService {
    status: ServiceStatus,
}

impl IPCService {
    pub fn new() -> Result<Self, String> {
        Ok(IPCService {
            status: ServiceStatus::Stopped,
        })
    }

    /// 创建共享内存区域
    pub fn create_shared_memory(&self, size: usize) -> Result<SharedMemoryRegion, String> {
        info!("Creating shared memory region of size {}", size);
        // 这里实现共享内存创建逻辑
        Ok(SharedMemoryRegion::new(size))
    }

    /// 创建消息队列
    pub fn create_message_queue(&self, name: &str) -> Result<MessageQueue, String> {
        info!("Creating message queue: {}", name);
        // 这里实现消息队列创建逻辑
        Ok(MessageQueue::new(name))
    }

    /// 创建管道
    pub fn create_pipe(&self) -> Result<(PipeReader, PipeWriter), String> {
        info!("Creating pipe");
        // 这里实现管道创建逻辑
        Ok((PipeReader::new(), PipeWriter::new()))
    }

    /// 创建信号量
    pub fn create_semaphore(&self, initial_value: u32) -> Result<Semaphore, String> {
        info!("Creating semaphore with initial value {}", initial_value);
        // 这里实现信号量创建逻辑
        Ok(Semaphore::new(initial_value))
    }

    /// 同步IPC调用
    pub fn sync_ipc_call(&self, service_name: &str, _data: &[u8]) -> Result<Vec<u8>, String> {
        info!("Making sync IPC call to service: {}", service_name);
        // 这里实现同步IPC调用逻辑
        Ok(Vec::new())
    }

    /// 异步IPC调用
    pub fn async_ipc_call(&self, service_name: &str, _data: &[u8]) -> Result<IpcFuture, String> {
        info!("Making async IPC call to service: {}", service_name);
        // 这里实现异步IPC调用逻辑
        Ok(IpcFuture::new())
    }
}

impl Service for IPCService {
    fn name(&self) -> &'static str {
        "ipc"
    }

    fn start(&mut self) -> Result<(), String> {
        info!("Starting IPC Service");
        self.status = ServiceStatus::Starting;
        
        // 这里可以添加IPC服务启动逻辑
        // 例如：初始化IPC机制、注册服务等
        
        self.status = ServiceStatus::Running;
        info!("IPC Service started successfully");
        Ok(())
    }

    fn stop(&mut self) -> Result<(), String> {
        info!("Stopping IPC Service");
        self.status = ServiceStatus::Stopping;
        
        // 这里可以添加IPC服务停止逻辑
        // 例如：清理IPC资源、注销服务等
        
        self.status = ServiceStatus::Stopped;
        info!("IPC Service stopped successfully");
        Ok(())
    }

    fn status(&self) -> ServiceStatus {
        self.status.clone()
    }
}

/// 共享内存区域
#[derive(Debug, Clone)]
pub struct SharedMemoryRegion {
    id: u64,
    size: usize,
    is_mapped: bool,
}

impl SharedMemoryRegion {
    pub fn new(size: usize) -> Self {
        static NEXT_ID: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(1);
        SharedMemoryRegion {
            id: NEXT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
            size,
            is_mapped: false,
        }
    }

    pub fn id(&self) -> u64 {
        self.id
    }

    pub fn size(&self) -> usize {
        self.size
    }

    pub fn is_mapped(&self) -> bool {
        self.is_mapped
    }
}

/// 消息队列
#[derive(Debug, Clone)]
pub struct MessageQueue {
    name: String,
    message_count: u32,
}

impl MessageQueue {
    pub fn new(name: &str) -> Self {
        MessageQueue {
            name: name.to_string(),
            message_count: 0,
        }
    }

    pub fn name(&self) -> &str {
        &self.name
    }

    pub fn message_count(&self) -> u32 {
        self.message_count
    }
}

/// 管道读取器
#[derive(Debug, Clone)]
pub struct PipeReader {
    id: u64,
}

impl PipeReader {
    pub fn new() -> Self {
        static NEXT_ID: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(1);
        PipeReader {
            id: NEXT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
        }
    }

    pub fn id(&self) -> u64 {
        self.id
    }
}

/// 管道写入器
#[derive(Debug, Clone)]
pub struct PipeWriter {
    id: u64,
}

impl PipeWriter {
    pub fn new() -> Self {
        static NEXT_ID: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(1);
        PipeWriter {
            id: NEXT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
        }
    }

    pub fn id(&self) -> u64 {
        self.id
    }
}

/// 信号量
#[derive(Debug, Clone)]
pub struct Semaphore {
    id: u64,
    value: u32,
}

impl Semaphore {
    pub fn new(initial_value: u32) -> Self {
        static NEXT_ID: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(1);
        Semaphore {
            id: NEXT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
            value: initial_value,
        }
    }

    pub fn id(&self) -> u64 {
        self.id
    }

    pub fn value(&self) -> u32 {
        self.value
    }
}

/// IPC异步调用结果
#[derive(Debug, Clone)]
pub struct IpcFuture {
    id: u64,
    is_completed: bool,
}

impl IpcFuture {
    pub fn new() -> Self {
        static NEXT_ID: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(1);
        IpcFuture {
            id: NEXT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
            is_completed: false,
        }
    }

    pub fn id(&self) -> u64 {
        self.id
    }

    pub fn is_completed(&self) -> bool {
        self.is_completed
    }
}

/// IPC管理器
pub struct IPCManager {
    #[allow(dead_code)]
    shared_memory_regions: Vec<SharedMemoryRegion>,
    #[allow(dead_code)]
    message_queues: Vec<MessageQueue>,
    #[allow(dead_code)]
    pipes: Vec<(PipeReader, PipeWriter)>,
    #[allow(dead_code)]
    semaphores: Vec<Semaphore>,
}

impl IPCManager {
    pub fn new() -> Self {
        IPCManager {
            shared_memory_regions: Vec::new(),
            message_queues: Vec::new(),
            pipes: Vec::new(),
            semaphores: Vec::new(),
        }
    }

    pub fn register_service(&mut self, service_name: &str) -> Result<(), String> {
        info!("Registering IPC service: {}", service_name);
        Ok(())
    }

    pub fn unregister_service(&mut self, service_name: &str) -> Result<(), String> {
        info!("Unregistering IPC service: {}", service_name);
        Ok(())
    }
}